.o-input-file{
    margin-left: 2vw;
    width: 5vw;
    border-radius: 4px;
    position: relative;
    text-align: center;
    line-height: 4vh;
    font-size: 12px;
    background-color: #CECECE;
    input{
        position: absolute;
        width: 100%;
        height: 100%;
        opacity: 0;
        left: 0;
        top: 0;
        cursor: pointer;
    }
}